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- Title
STUDY OF GLASS TRANSITION TEMPERATURE OF PMMA AND CdS-PMMA COMPOSITE.
- Authors
Dixit, Manasvi; Gupta, Sandhya; Mathur, Vishal; Rathore, Kuldeep S.; Sharma, Kananbala; Saxena, N. S.
- Abstract
The present study investigates the effect of dispersed CdS on the α- and β- relaxation processes of Poly (methyl methacrylate) (PMMA). Dynamic Mechanical Analyser (DMA) have been employed at fixed frequency 1Hz at temperatures from -80 °C to 150 °C to study the dynamics of films of thickness ∼ 0.05 mm of PMMA and CdS-PMMA composite. Amorphous PMMA polymer exhibits two relaxation processes. A primary (glass, or α-) relaxation process commonly referred as glass transition or α-relaxation process and a low-temperature relaxation process associated with the hindered rotation of the side group usually referred to as the β-relaxation process. CdS dispersed PMMA composite also shows a and β relaxation process and are observed at higher values of temperature as compared to pure PMMA. The higher values of glass transition temperatures are attributed to the more rigid structure of the CdS-PMMA system over the pure PMMA.
- Subjects
GLASS transition temperature; THERMOPHYSICAL properties; NANOCOMPOSITE materials; COMPOSITE materials; METHYL methacrylate; POLYMERS; AMORPHOUS substances; NANOPARTICLES; NANOSTRUCTURED materials
- Publication
Chalcogenide Letters, 2009, Vol 6, Issue 3, p131
- ISSN
1841-4834
- Publication type
Article